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Fixed bug in documentation.
Annotate for file /docs/html/nil-template-class.html
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<html>
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<head>
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<title>CL Unification: Class NIL-TEMPLATE</title>
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<link rel="stylesheet" href="main.css">
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</head>
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<body marginheight="0" marginwidth="0" leftmargin="0" topmargin="0" bgcolor="#ffffff">
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<table border="0" cellpadding="0" cellspacing="0" width="100%" height="100%" vspace="0" hspace="0">
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<tr>
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<td colspan="3">
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<div class="header"
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style="font-family:=Verdana,Arial,Helvetica; font-size: 18px; color: #41286f;">
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<strong><i>CL Unification: Class NIL-TEMPLATE</title></i></strong>
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<div class="navigation">
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<a href="index.html" class="navigation-link">Home</a>
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</div>
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<div class="black-line"><img src="images/shim.gif" height="1" width="1"></div>
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<div class="middle-bar"><img src="images/shim.gif" height="5" width="1"></div>
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<div class="black-line"><img src="images/shim.gif" height="1" width="1"></div>
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</td>
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</tr>
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<tr height="100%">
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<td height="100%"> </td>
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<td valign="top" width="80%" height="100%">
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<div class="content">
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<div class="text" style="padding-top: 10px;">
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<h1><i>Class</i> <strong>NIL-TEMPLATE</strong></h1>
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<h2>Package:</h2>
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<p><code>COMMON-LISP.EXTENSIONS.DATA-AND-CONTROL-FLOW.UNIFICATION</code></p>
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<h2>Class Precedence List:</h2>
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<p>
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NIL-TEMPLATE, TYPE-TEMPLATE, TEMPLATE, STANDARD-OBJECT, T.
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</p>
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<h2>Known Subclasses:</h2>
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<p>
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None.
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</p>
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<h2>Slots:</h2>
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<p>None.</p>
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<h2>Description:</h2>
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<p>The NIL-TEMPLATE class denotes those object that are used
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to unify against NIL.</p>
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<h3>Template Syntax:</h3>
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<p>
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<pre>
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#Tnil
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</pre>
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</p>
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<p>
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<pre>
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#T()
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</pre>
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</p>
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<p>The NIL-TEMPLATE syntax denotes NIL.
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NIL-TEMPLATE can only unified against NIL.</p>
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<p>The NIL-TEMPLATE is used for symmetry reasons, given that the
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template hierarchy (almost) mirrors the regular <strong>CL</strong>
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type hierarchy.</p>
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<h2>Examples:</h2>
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<p>
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<pre>
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cl-prompt> (setf e (unify nil #Tnil))
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#<ENVIRONMENT xxx>
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cl-prompt> (setq e (unify 42 #T()))
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--> Error: UNIFICATION-FAILURE
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</pre>
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</p>
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<h2>Affected By:</h2>
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<p>None.</p>
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<h2>Exceptional Situations:</h2>
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<p>Unifying an NIL-TEMPLATE against a non-NIL object results in
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an UNIFICATION-FAILURE error being signaled.</p>
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<h2>See Also:</h2>
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<p>UNIFY</p>
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<h2>Notes:</h2>
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<p>None.</p>
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</td>
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<!-- <td height="100%"> </td> -->
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</tr>
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<tr height="100%">
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<td height="100%"> </td>
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<td valign="top" width="80%" height="100%">
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<div class="content">
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<div class="text" style="padding-top: 10px;">
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<h1>News</h1>
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<p>News in chronological order, most recent on top.
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</p>
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<ul>
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<li><strong>2004-10-30</strong><br>
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Completed description.
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</li>
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</ul>
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</div>
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</div>
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</td>
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<td height="100%"> </td>
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</tr>
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<tr>
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<td colspan="3" valign="bottom" align="right">
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<div class="copyright">
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© 2003-2004, Marco Antoniotti, all rights reserved.
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</div>
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</td>
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</tr>
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</table>
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</body>
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</html>
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<!-- end of file -- expression-template-class.html -->